[BP][FIX] hreflang: add self-referential alternate link for wiki pages

Olivier Kangorequested to merge
olivierkango/tiki:29x-fix/hreflang-self-ref into 29.x
  • [FIX] hreflang: add self-referential alternate link for wiki pages
  • [FIX] hreflang: add self-referential alternate link for wiki pages
  • Add self alternate for the current wiki page.
  • Use TikiLib::lib('wiki')->sefurl($this->page) so the self href equals the canonical URL.
  • Keep existing alternate links for other translations unchanged.

This fixes the task “Issue with hreflang tag in the page header” where pages only emitted alternates for other languages but not for themselves.

Ref: https://dev.tiki.org/item8806

See merge request !8299 (merged)

(cherry picked from commit 88045800)

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